Pull-socket.



D. D. GORDON.

PULL SOCKET.

APPLICATION min FEB. 12. 19m.y

Patented Oct. 10, 1916.

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1. A i. i t* DAVID GORDON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE YOS'I' ELECTRICYMANU- FACTURING COMPANY, OF TOLEDO, OHIO, A. CORPORATION 0F OHIO.

PULL-SOCKET.

Specification of Letters Patent. Patented Oct 10, 1916.

Application filed February 12, 1914. Serial No. 818,237.

To all whom t may concern:

Be it known that I, DAVID GORDON, a citizen of the United States, residing at Chicago, in the county of Cook and Sta-te of Illinois,'ha\`e invented a certain new and useful Improvement in Pull-Sockets, of which the following is a full, clear. concise, and exact description, reference being had to the accompanying drawing, forming. a part of this specification.

My invention relates to mechanical move'- ments and is more particularly adapted to switch movements for electrical devices, being in its preferred form of particular utility in connection with so-called pull sockets.

In what follows I will set forth my invention in that particular form which it would take if used in connection with a pull socket. In general, a pull socket constructed in accordance with my invention has means to effect both a rapid make and rapid break. My invention contemplates the provision of a movement accomplishing this result which is of a very simplified character and which in its preferred form does not necessitate the use of any sliding parts. I will explain this form which my invention may take more in detail by referring to the accompanying drawing, in which- Figure 1 is a vertical sectional view of a 'pull socket constructed in accordance with my invention; Fig. 2 is a sectional view on line a-a of Fig. 1; Fig. 3 is a view similar to Fig. 2 showing the parts in their alternative position; Fig. 4 is a perspective view of one of the elements of vthe switch structure; Fig. 5 is a perspective -view of another element of the switch structure; Fig. 6 is a fragmentary sectional view on line b-o of Fig. 2, and Fig. 7 is a sectional view on line c-c of Fig. 1."

' My im}oved structure contemplates a socket wall l having two insulating plates 2 and 3 and the inlet aperture 4. for the conductors. The plate 3 carries the central contact 5 adapted for association with the central contact of the lamp, and also carries the screw vthreaded -contact 6 adapted to engage the screw threaded contact of the lamp.v One of the leading in conductors 7 is preferably connected by means of the screw 8 with the centralcontact element 5 and the other inby-means of the bus bar 11 with a coperating switch terminal 12. My improved movement 1s designed to open and close the circuit between the switch terminals 10 and 12 by snap action. The element 13 pivoted upon the shaft 14 is designed to enter between the switch elements 10 and 12 when properly actuated and close the circuit between them.

y This switch arm 13 is controlled in its positiongby a rotatable element 15 mounted by means of the studs 16 in the framework of the socket. This element 15 carries at'its opposite `extremities toes 17, 1S, andI also cam-like prominences or projections 19. This element as stated is pivotally mounted by means of its extending studs 16. A spring 20 which is carried about the shaft 21 presses against'this element 15 and holds it in a position parallel to the spring arm 20. This -spring has a further extending arm 22 which presses against an operating arm 23 pivotally mounted upon the shaft4 21. This operatingarm 23 carries by means of the studs 24 a substantially L-shaped arm 25. This L-shaped arm has the extending foot 26 to which a chain 27 isattached, which chain leaves the socket wall through the iiaringA orifice' 28. The arm 23l is designed to be pulled into the position shown in Fig.'3 by pivot 24 in a clockwise direction away from the element 15, but this has nothing to do especially with the structure because the minute the tension is exerted against the chain 27 the arm 25 swings contra-clockwise until the iinger 30 rests against the element 15 as shown in Fig. 2, and a. further pull exerted by the chain will cause rotation of the arm' 23 in a contra-clockwise direction lwhich will carry the element 15 in a contra-r clockwise direction because the finger 29 engages the toe 17 (Fig. 2A). Assuming then that apull is being exerted on the chain 27 of Fig. 2 the element 15 will be rotated in a contra-clockwise direction until it is.. substantially at right angles to its present position, whereupon a slight further movement will cause the spring 2O to become effective to complete a further contraclockwise rotation of this element 15 in a snap action manner until it occupies the position of Fig. 3. In this way each actuation of the chain causes a. snap action movement of theelement 15 during substantially the latter half or ninety degrees of its movement. As this` snap action movement takes place, the projections 19, which engage the element 13 within the confines of the slot 31, rapidly force this element 13, from one of its al ternative positions to the other, thus effecting a quick make and a quick break of the circuit through the terminals 10, 12.

` From what has been described it is thought the nature of my invention will be entirely clear' and readily apparent to those skilled in the art.

Having however thus described one form which my invention may take, what 1 claim as new and desire to secure by Lettersv Pat- Y ,ent is:

1. A device of the character described comprising a movable switch element, a tension member, and means interposed between said tension member and said switch element to move said switch element by snap action into each of its limiting positions, said means `including a cam for vmechanically moving said movable switch element from one to the other of its resting positions.

2. A device of the character described having a movable switch element, a tension member, and means interposed between said tension member and said movable switch element to move said switch element to effect both a quick make and quick break ofthe circuit controlled thereby, said means including a cam for mechanically moving said movable switch element from one to the other of its resting positions.

l 3. 4A device' of the character described having a movable switch element, a tension member, and means interposed between said tension member and said 'movable switch element to move said switch element to efect 1 both a quick make and quick break of the circuit controlled thereby, said means in- Y cluding a rotatable element adapted to oc-v cupy a plurality of resting positions and 'having non-yielding means to mechanically 5 lcontrol said movable switch element and shift it from one limiting position to the other.

4. A device of the character described having. a movable switch element, a tension member, and means interposed between said tension member and said movable switch element to move said switch element to elfect both a quick make and quick-break of the circuit'controlled thereby, said means includ- --ing a rotatable v,elementadapted to occupy a plurality of resting positions and carrying a cam, said movable switch element being moved to one or the other of itsalternative positions directly by said cam.

5. A device of thecharacter described hav- ,ing a movable switch element, a tension cupy a plurality of resting positions and,

carrying a Acam and a spring for forcing said rotatable element into said resting positions, said -movable switch element bein moved to one or the other of its alternative positions directly by said cam.

6. A device of the character described lhaving a movable switch element, a tension member and means interposed between said tension member and said movable switch elementto move said switch element to effect both a quick make and quick break of the circuit controlled thereby, said means including a rotatable element adapted to occupy a plurality of resting positions and car-` rying a cam, a spring for forcing said rotatable element into said resting positions, and an arm adapted when actuated to move said rotatable element from its resting position beyond its position of repose, said movable switch element being moved to one or the other of its alternative positions directly by said cam.

7 A device of the character described having a movable switch element, a tension member, and means interposed between said, tension member and said movable Vswitch element to move said switch element to effect both a quick make and quick break of the circuit controlled thereby, said means in cluding Aa rotatable element adapted to occupy a plurality of resting positions and carrying a cam, a spring for forcing said rotatable element into said resting positions, and an arm Aadapted when actuated to move said rotatable element from its resting Vposition beyond its position of repose, said arm enga-ging said spring. V

8. A device of the character described having a movable switch element, a tension member, and means interposed between said tension member and said movable switch element 'to move said switch element to effect both a quick make and` quick break of the circuit controlled thereby, said means in cluding a rotatable element adapted to occupy a plurality of resting positions and carrying a cam, a spring for forcing said rotatable element into said resting positions, and an arm adapted when actuated to control movements of said rotatable element from its resting position beyond its position of repose, said arm engaging said spring,

said arm carrying an arm having angularly disposed extensions, one of said extensions engaging said rotatable element.

S). A device of the character described having a movable switch element, a tension member, and means interposed between said tension member and said movable switch element to -move said switch element to effect both a quick make and quick break of the circuit controlled thereby, said means including a rotatable element adapted to occupy ,a plurality of resting positions and carrying a cam, a spring for forcing said rotatable element into said resting positions, and an arm adapted when actuated to move said rotatable element from its resting Vposition beyond its position of repose, said arm said tension member and said switch element to move said element by snap action into each of its limiting positions, said means including a pawl, a pivoted frame on which said pawl is pivoted, and a ratchet, said tension member engaging said pawl and by its pull swinging said pawl about its pivot into engagement with the said ratchet.

1.1. A device of the character described comprising a movable switch element, a tension member, and means interposed between said tension member and said switch element to move said switch element by snap action into each of its limiting positions, said means including a cam for mechanically moving said movable switch element from one to the other of its resting positions, said cam being pivoted independently of said switch element.

In witness whereof, I hereunto subscribe in v name this 22nd day of January, A. D. 1914.

DAVID D. GORDON.

Witnesses:

HAZEL ANN JONES, A. L. JONES.

Copies of this patent may be obtained for ive cents each, by addressing the "Commissioner of Patents. Washington, D. C. 

